A three-point riveting device, a riveting system comprising the same and a riveting method

Abstract

The application discloses a three-point riveting device, a riveting system comprising the same and a riveting method, the riveting device comprising a body, a punch, a return spring, a spring baffle, a screw and an adjusting pad, the body is provided with a middle hole for placing the adjusting pad and a riveting piece, and the top of the body is provided with three groups of stepped holes for mounting the punch, the return spring, the spring baffle and the screw. The riveting system comprises the riveting device, and further comprises a hydraulic station, a two-way oil pipe, a hydraulic chuck and a hydraulic reversing valve, the hydraulic station delivers hydraulic oil to the hydraulic chuck through the oil pipe, the riveting device is arranged in the middle of the hydraulic chuck, the hydraulic oil is controlled to enter and exit the two-way oil pipe through the hydraulic reversing valve, and the three claws of the hydraulic chuck are driven to stretch and retract to drive the punch to reciprocate, so that three-point synchronous riveting is realized. The application solves the problems of poor consistency of riveting depth and shape, low efficiency, riveting product warping and deformation and the like of a thin-walled piece, and has the characteristics of compact structure, simple operation, common power system and the like, and is suitable for riveting of various types of explosive products with explosion-proof requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical product riveting, in particular to a three-point riveting device, a riveting system comprising the same and a riveting method. BACKGROUND

[0002] Current pyrotechnic lifesaving signal products all contain ignition details, and are usually fixed and connected by manually riveting the ignition head in the central hole of the nylon reinforcement body and the thin-walled steel cylinder in multiple points and multiple times. Due to the difficulties of the product with dangerous explosive and the impact riveting warping deformation of the thin-walled part, it is necessary to not only ensure the reliable connection (riveting point depth and shape consistency) of the nylon body and the thin-walled cylinder, but also avoid the excessive riveting force from causing the ignition head to act and damage the thin-walled cylinder, etc. Therefore, the operation method of the operator is extremely harsh, resulting in low production efficiency, low good product rate, and unable to achieve man-machine isolation.

[0003] How to improve the existing special riveting technology to overcome the above problems is a problem that technicians in the field are eager to solve. SUMMARY

[0004] The present application provides a three-point riveting device, a riveting system comprising the same and a riveting method, which adopts the same set of hydraulic power system, multiple operation stations, structural hard limit and punch shape to control the riveting depth and shape of the product, solving the problems of poor quality consistency of manual multiple point and multiple time riveting and unable to operate safely and isolate man and machine.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted:

[0006] A three-point riveting device, comprising a body, a punch, a return spring and a spring baffle, wherein the top of the body is provided with a central hole and three sets of stepped holes, the central hole is used for placing a riveting part, and the stepped holes are used for installing the punch, the return spring and the spring baffle.

[0007] As a preferred embodiment of the above-mentioned scheme, an adjusting pad is arranged in the central hole.

[0008] As a preferred embodiment of the above-mentioned scheme, the stepped hole is fixed with the spring baffle by a screw.

[0009] As a preferred embodiment of the above-mentioned scheme, the punch comprises a punch head, a punch shoulder and a punch handle arranged in sequence.

[0010] A riveting system comprising the three-point riveting device, further comprising a hydraulic station, a bidirectional oil pipe, a hydraulic chuck and a hydraulic reversing valve, wherein the hydraulic station provides hydraulic oil to the hydraulic chuck through the bidirectional oil pipe, and the hydraulic reversing valve controls the direction of the oil path to control the direction of the three-jaw stroke of the hydraulic chuck; the body is placed in the middle of the hydraulic chuck, and the punch is aligned with the three-jaw built-in the hydraulic chuck, and the placement deviation of the three-point riveting device is automatically corrected by the radial movement of the three-jaw built-in the hydraulic chuck.

[0011] As the preferred of the above scheme, the punch and the spring baffle form two height values d1, d2 by the reset spring, and d1>d2+1mm is required; wherein the height value d1 is determined by the three-jaw stroke of the hydraulic chuck, and the height value d2 is used to control the riveting depth of the riveting part.

[0012] As the preferred of the above scheme, d1 is 4.2mm, and d2 is 1.3mm.

[0013] As the preferred of the above scheme, the hydraulic station comprises an oil tank, a pump and a power line, and the oil tank and the pump are isolated by a protective cover.

[0014] As the preferred of the above scheme, a workbench is further included, and a plurality of three-point riveting devices are respectively installed on the workbench through fixed bases, and the power line is installed on the workbench through an explosion-proof socket.

[0015] A riveting method based on the above riveting system, comprising the following steps:

[0016] S1, the open end of the thin-walled cylindrical riveting part is placed downward in the middle hole position of the three-point riveting device body;

[0017] S2, check the initial state of the oil tank, pump, bidirectional oil pipe and hydraulic reversing valve of the hydraulic station;

[0018] S3, turn on the power supply, start the hydraulic station, and the three-jaw inside the hydraulic chuck is elongated to start the forward riveting operation;

[0019] S4, switch the direction of the hydraulic reversing valve, the three-jaw inside the hydraulic chuck is retracted, the punch is restored to the initial position under the driving of the reset spring, and the riveting part is taken out.

[0020] Due to the above structure, the beneficial effects of the present application are as follows:

[0021] (1) The riveting point depth and shape are controlled by adopting the structure hard limit and the punch shape, and the three-point riveting is performed at one time, which effectively avoids the manual multi-point riveting operation, and improves the quality consistency of the riveting product.

[0022] (2) Compared with pneumatic and electric drive, the hydraulic station is matched with the hydraulic chuck drive in the present application, which is more convenient to configure, and no static electricity, sparks and other explosion factors are generated in the operation process, and the hydraulic drive is stable and controllable, and the product is not damaged.

[0023] (3) The structure is compact, the operation is simple and fast, and it is suitable for riveting of various explosive products with explosion-proof requirements. BRIEF DESCRIPTION OF DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0025] Figure 1 This is an exploded view of a three-point riveting device according to the present invention;

[0026] Figure 2 This is a cross-sectional schematic diagram of a three-point riveting device according to the present invention;

[0027] Figure 3 for Figure 2 A magnified view of a portion of the image is shown in section A.

[0028] Figure 4 This is a three-dimensional structural diagram of the punch of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of a riveting system according to the present invention;

[0030] Figure 6 for Figure 5 A magnified view of a portion of the image is shown in section B.

[0031] Wherein: 0-Riveted parts (product); 01-Steel thin-walled cylinder; 02-Nylon reinforcement; 03-O-ring; 1-Body; 2-Punch; 201-Punch head; 202-Punch shoulder; 203-Punch handle; 3-Reset spring; 4-Spring baffle; 5-Screw; 6-Height adjustment pad; 7-Two-way oil pipe; 8-Hydraulic chuck; 9-Hydraulic directional valve; 10-Fixed base; 11-Worktable; 12-Protective cover; 13-Hydraulic station. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] like Figure 2 As shown, the riveting component (product) 0 consists of a thin-walled steel cylinder 01, a nylon reinforcement 02, and an O-ring 03.

[0034] In view of the characteristics of riveted parts, this embodiment provides a three-point riveting device, such as... Figures 1 to 3 As shown, it includes a body 1, a punch 2, a return spring 3, and a spring baffle 4. The top of the body 1 is provided with a central hole and three sets of stepped holes. The central hole is used to place the riveting part 0, and the stepped holes are used to install the punch 2, the return spring 3, and the spring baffle 4.

[0035] In the embodiment, the middle hole is provided with an adjusting pad 6. The stepped hole is fixed with the spring stopper 4 and the screw 5, and when the punch 2 or the return spring 3 reaches the service life, the spring stopper 4 and the screw 5 are disassembled for replacement. The punch 2 comprises a punch head 201, a punch shoulder 202 and a punch handle 203 (as shown in Figure 4 The punch 2 is made of tool steel CrWMn, and the replacement cycle is 5000 pieces / time. The return spring 3 is made of spring steel 65Mn, and the service life is higher than 10000 times.

[0036] As shown in Figure 5 , Figure 6 The embodiment also provides a riveting system, which comprises the three-point riveting device and a hydraulic station 13, a bidirectional oil pipe 7, a hydraulic chuck 8, a hydraulic reversing valve 9 and a workbench 11. The hydraulic station 13 provides hydraulic oil to the hydraulic chuck 8 through the bidirectional oil pipe 7, and the hydraulic reversing valve 9 controls the direction of the oil path to control the stroke direction of the built-in three-jaw chuck 8. The three-point riveting device (the body 1) is arranged in the middle of the hydraulic chuck 8, the punch 2 is aligned with the built-in three-jaw chuck 8, and the built-in three-jaw chuck 8 is radially moved to automatically correct the placement deviation of the three-point riveting device.

[0037] In the embodiment, the punch 2 and the spring stopper 4 form two height values d1 and d2 by using the return spring 3, and d1>d2+1mm. Specifically, the height value d1 is determined by the stroke of the built-in three-jaw chuck 8, and d1 is 4.2mm. The height value d2 is used to control the riveting depth of the riveting piece 0, and d2 is 1.3mm. The thickness of the punch shoulder 202 can be adjusted to adapt to the height value d1 or the height value d2.

[0038] In the embodiment, the hydraulic station 13 comprises an oil tank, a pump and a power line. The oil tank and the pump are isolated by the protective cover 12 to avoid sparks generated in the instant when the pump is started. The power line is installed on the workbench 11 by using an explosion-proof socket. The bidirectional oil pipe 7 is used to deliver or discharge hydraulic oil to or from the hydraulic chuck 8 when the hydraulic reversing valve 9 is switched. The three-point riveting device is installed on the workbench 11 by using a fixed base. By using the riveting system, multiple riveting devices and hydraulic chucks 8 can be configured to simultaneously perform multi-station riveting operations.

[0039] The embodiment also provides a riveting method based on the riveting system, which comprises the following steps:

[0040] S1, the thin-walled cylindrical riveting piece 0 is placed in the middle hole of the three-point riveting device body 1 with the opening end downward, the gap between the middle hole of the body 1 and the single side of the steel thin-walled cylinder is not more than 0.1mm, and the riveting piece 0 is guided in the riveting device.

[0041] S2, check the initial state of the oil tank, pump, two-way oil pipe 7 and hydraulic reversing valve 9 of hydraulic station 13;

[0042] S3, turn on the power, start the hydraulic station 13, and the built-in three-jaw of the hydraulic chuck 8 is stretched to start the positive riveting operation;

[0043] S4, switch the direction of the hydraulic reversing valve 9, the built-in three-jaw of the hydraulic chuck 8 is retracted, the punch 2 is restored to the initial position under the action of the return spring 3, and the riveting piece 0 is taken out.

[0044] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A riveting system characterized by: The three-point riveting device comprises a body, a punch, a return spring and a spring baffle, the top of the body is provided with a middle hole and three sets of stepped holes, the middle hole is used for placing a riveting part, and the stepped holes are used for installing the punch, the return spring and the spring baffle. The stepped holes are fixed with the spring baffle through screws. The punch comprises a punch head, a punch shoulder and a punch handle arranged in sequence. The middle hole is provided with an adjusting pad.

2. A riveting system according to claim 1, wherein: The punch and the spring baffle form two height values d1 and d2 by using the return spring, and d1>d2+1mm is required; the height value d1 is determined by the stroke of the built-in three-jaw chuck, and the height value d2 is used for controlling the riveting depth of the riveting part.

3. A riveting system according to claim 1, wherein: d1 is 4.2mm, and d2 is 1.3mm.

4. A riveting system according to claim 3, wherein: The hydraulic station comprises an oil tank, a pump and a power line, and the oil tank and the pump are isolated by a protective cover.

5. A riveting system according to claim 1 wherein: The workbench surface is further provided with a plurality of three-point riveting devices which are installed on the workbench surface through fixed bases, and the power line is installed on the workbench surface through an explosion-proof socket.

6. A riveting system according to claim 1 wherein: The riveting system based on claim 1 comprises the following steps:

7. A method of riveting, characterized by: S1, a thin-walled cylindrical riveting part is placed in the middle hole of the body of the three-point riveting device with the opening end downward; S2, the initial state of the oil tank, the pump, the two-way oil pipe and the hydraulic reversing valve of the hydraulic station is checked; S3, the power is turned on, the hydraulic station is started, and the built-in three-jaw chuck of the hydraulic chuck is stretched to start the riveting operation; S4, the direction of the hydraulic reversing valve is switched, the built-in three-jaw chuck of the hydraulic chuck is retracted, the punch is restored to the initial position under the driving of the return spring, and the riveting part is taken out. ​

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